1 Features

• Rail-to-rail input common-mode voltage range,

specified over temperature

• Rail-to-rail output swing within 100mV of supply

rail, 2kΩ load

• Can operate on standard 5V and 15V supplies

• Excellent CMRR and PSRR: 82dB

• Ultra-low input current: 150fA

• Low supply current (at VS = 5V): 500μA/amplifier

• Low offset voltage drift: 1.0μV/°C

2 Applications

• Automotive transducer amplifier

• Pressure sensor

• Oxygen sensor

• Temperature sensor

• Speed sensor

3 Description

The LMC6492 and LMC6494 (LMC649x) amplifiers

were specifically developed for single-supply

applications that operate from −40°C to +125°C. This

feature is an excellent choice for automotive systems

because of the wide temperature range. A unique

design topology enables the LMC649x common-mode

voltage range to accommodate input signals beyond

the rails. This eliminates non-linear output errors

due to input signals exceeding a traditionally limited

common-mode voltage range. The LMC649x signal

range has a high CMRR of 82dB for excellent

accuracy in noninverting circuit configurations.

The LMC649x rail-to-rail input is complemented by

rail-to-rail output swing. This configuration provides

maximum dynamic signal range and is particularly

important in 5V systems.

An ultra-low input current of 150fA and a 120dB openloop

gain provide high accuracy and direct interfacing

with high-impedance sources.